Tag Archives: energy

Verv Shows Where Your Energy Goes



London-based firm Green Running have launched Verv, a home energy assistant that uses AI technology to automatically figure out which appliances are running and how much they’re costing. It’s clever stuff and they’ve got 6 patents to prove it.

The UK’s smart meter programme has taken a bit of hammering in the press recently with The Register covering the debacle along with a healthy dose of cynicism. In agreement, Peter Davies, CEO & Founder of Green Running points out, “Smart Meters are being rolled out across homes but they simply don’t provide enough detail to tell the consumer what is actually costing them money. They just provide a total cost of your electricity usage. We are able to sample data at extremely high frequencies enabling us to read the ‘energy signature’ of individual electrical appliances. This means we can show the user in real time how much their appliances are costing them, in addition to an array of other functions such as alerting them if an appliance is deteriorating or if they’ve left something on.

Being able to tell which appliances are electricity is handy, especially if it reveals when an older unit is consuming too much power either through slow failure or that newer models consume far less.

Verv doesn’t need to be installed by an electrician – there’s no fiddling with electricity here. Simply, there’s three parts. A Verv hub, a sensor clamp that goes round the main power cable, and an app for both iOS and Android. The only snag I can see from the installation video, is the hub needs a power socket near the meter.

Verv is electricity supplier neutral too and it doesn’t matter who supplies the power. In fact, it’s probably a good way to check that the supplier is billing correctly as 60% of consumers don’t understand their utility bills.

Integration with Amazon Alexa is touted on the web site though there’s no detail at present on what features might be supported in the skill. There’s also no mention of an interface to any smart home gear, such as Samsung SmartThings, but I would imagine that’s on the priority list as Verv’s competitor, Smappee, is already there. IFTTT would be good too but it’s early days.

Verv is currently open for pre-orders at GB£249 with delivery expected in the autumn (the website says October, the press release says November…)


SolarGaps Launch on Kickstarter



SolarGaps combine venetian blinds with solar panels to keep interiors cools and generate electricity. Easily mounted on the exterior of a property over windows, the SolarGaps smart blinds are a clever solution that’s available to all homeowners, not just those with roofs.

Todd interviewed Erik from SolarGaps at CES this year and as predicted, the products are now on Kickstarter for delivery in September. The campaign seems to be going well, with nearly 95% funding and 23 days to go – I think they’ll hit their target. There are different sizes available but for indicative purposes, a 3′ by 3′ blind costs US$390, which is 50% off the suggested retail price.

As smart blinds, the SolarGaps can do clever things, such as altering their angle to maximise sunlight on the panels, or automatically opening if someone comes into the room. SolarGaps integrates seamlessly with smartphones, Google Home, Amazon Echo, and the Nest Thermostat. It can either feed electricity back into the grid or into a battery system like the Tesla Powerwall. The SolarGaps generate about 100W per square metre.

Looks like a great “gen 1” implementation.


SolarGaps Solar Panel Smart Blinds at CES



The trouble with solar panels is that they take up a fair bit of space, typically on the roof of a property, which means that those living in apartments or condos often miss out on the opportunity to generate electricity from the sun. SolarGaps have a solution to this issue, with solar panels that also work as blinds, both generating power and shielding the interior. Todd talks to Erik at SolarGaps to find out more.

SolarGaps smart blinds are fitted to the exterior (or interior) of windows and automatically track the sun to maximise electricity generation and minimise heating effects. Installation is straightforward and each panel on the outside generates around 100 W-hrs per square meter so a south-facing 3 bedroom apartment could produce around 4 kW per day. As the blinds track the sun, the output is typically 20% higher than the equivalent static photovoltaic pnel. The blinds can be fitted inside too but this reduces the power output.

SolarGaps is launching on Kickstarter in February with a price around US$480 per square metre, rising to around $1000 per square metre when the product is launched, so if you are interested, get in early.

Todd Cochrane is the host of the twice-weekly Geek News Central Podcast at GeekNewsCentral.com.

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Pushing Power Back into The Grid



Phase Two Array ResizeI have always been fascinated by solar power. There’s something quite intriguing about the idea of simple sunlight hitting a solar panel and instantly producing electricity.

Home solar systems can take a few different forms. There are power backup systems that require the use of battery storage, as well as systems that allow people the luxury of electricity that live completely off-grid. Today, the most popular form of solar by far is known as grid-tie or Net Metering.

Grid-tie Net Metering

With grid-tie net metering solar power systems, no batteries are used. Grid-tied solar panels feed power back directly into the public electrical grid and can actually make the power meter run backwards. The more solar panels integrated into the system, the more potential power can be fed back into the connected electric grid. Power bills can either be reduced, or in some cases, completely zeroed out, depending on local electric power company policies.Solar Phase One

Solar panels produce DC or direct current. The power grid is AC or alternating current. Therefore, to sell power back to the electric utility, it is necessary to convert the DC power coming from solar panels into AC so it can be fed into the power grid. This is accomplished with DC to AC power inverters.Inverters Resize

I recently visited a home solar system installation where the home owner has been slowly expanding his net metering system over the past seven years. He initially began seven years ago with forty-three 100 watt 12 volt solar panels, placed on top of his workshop.

With this first system, it was necessary for him to run wires down the length of the interior roof to a bank of mounted micro-inverters that needed to be protected from the weather. One of the lessons he learned from this initial installation was that lengthy wires carrying 12 volt DC results in power loss. The longer the lines, the more the efficiency drops. Higher voltages don’t experience as much line loss.

The best way around this problem is to mount weatherproof micro-inverters directly to the backs of the solar panels. Once the power is converted to 120 volts AC, the length of the wires to the grid connection point are somewhat less critical because the voltage is higher.Grid Tie Inverter Resize

With the second phase of his foray into solar, he built a rack on a metal pole complete with a sun tracking mechanism that he built and wrote control software for himself. The rack contains nine higher efficiency 280 watt 24 volt panels with weather proof micro-inverters attached to the backs of the panels.

The weatherproof micro-inverters are of a modular design that can allow additional inverters to be plugged in to the to the system. The rack-mounted system produces as much power as the workshop roof-mounted panels, even though they have less surface area, primarily because they are higher-efficiency panels.Solar Porch Canopy

He is currently working on phase three of his system, which consists of panels that form a sort of porch canopy over the garage door entrance to his workshop.These are also 280 watt panels, each with its own micro-inverter. He is in the process of slowly adding additional panels to continue expanding his overall system capacity.Meter Output

At the moment when I took this picture of the system output meter, the total output was about 5.4 kilowatts.

A great way to learn more about solar panels, inverters and net metering is YouTube. Good search terms include solar power, grid-tie, and inverter.

Many recreational vehicle enthusiasts have developed a strong interest in attaching solar panels and power inverters to their RV’s, which can allow them to have a measure of generator-free and thus noise-free AC power and engage in extended off-grid camping.


Wireless Power Consortium at 2016 CES



Qi EverywhereScott Ertz interviews Arun Kumar, partner presenter at the Wireless Power Consortium booth.

They discuss the current state of wireless charging technology. They demonstrate a 15 watt wireless charger hooked to a laptop. It will soon be possible to integrate wireless charging circuitry directly into laptop computers for the first time, perhaps within a year.

Scott also interviews John Perzow, vice president of market development, about longer-distance charging. John demonstrates that it is now possible to charge a Qi device up to an inch away through an inch thick block of wood. Distance charging is problematic since electrical charging efficiency drops off very quickly with distance.

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Upp Fuel Cell at CES



Beupp LogoWhile USB battery packs are ubiquitous, they’re only any good if there’s somewhere to charge the battery pack in the first place. If there’s no electrical supply, options can be limited but with Intelligent Energy‘s new hydrogen fuel cell, Upp, there’s one more option available. Todd and Jamie get enthused with Julian Hughes of Intelligent Energy.

The Upp fuel call consists of a hydrogen micro generator and reusable fuel cartridge. One fuel cartridge gives approximately five full smartphone charges and is approved for carriage in aircraft. Each cartridge has a shelf-life of nine years, making it perfect for storage for emergencies. As it’s a fuel cell, not a battery, it doesn’t need charged from the electricity. Once turned on, the Upp with power devices at 1A via a full size USB port.

When spent the fuel cartridges can be recharged with hydrogen and extra cartridges can prolong time off grid. It’s perfect for those on long hiking trips or for those involved in emergency disaster relief.

The Upp is available in the UK for £149 including one cartridge. Additional cartridges are £49 and recharges costs £5.95. The Upp is expected to come to the US later in the year.

Interview by Jamie Davis of Health Tech Weekly and Todd Cochrane of Geek News Central for the TechPodcast Network.

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ThingCharger Eliminates Cable Clutter



ThingChargerDevice chargers are the bane of modern life with a complete rat’s nest of cables and connectors behind the average desk. Todd chats to Seymour Segnit from ThingCharger about their Indiegogo campaign for a cord-free charger.

The ThingCharger plugs directly into a power socket, with the device’s charging connector on the top of the unit, and pass-thru power outlets meaning that you don’t lose the socket but even more cunningly, you can stack the ThingCharger to charge multiple devices at the same time.

A range of interchangeable charging connectors – Apple 30-pin, Micro-USB, Mini-USB, Apple Lightning – will be available so that different devices can be charged from the same charger and cleverly, the connectors can be stored in the ThingCharger so they’re much harder to lose. It’s brilliant all round, so much so that ThingCharger raised nearly $650,000 against a £25,000 target.

ThingCharger is expected to be available in Q3 of 2014 and you can pre-order now for $29.95.

Interview by Todd Cochrane of Geek News Central for the TechPodcast Network.

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Gigabit Powerline from Trendnet at CES



TRENDnet LogoNetworking over electrical power lines has come a long way since the first HomePlug specification back in 2008 which was was rated at 14 Mb/s. Today network specialists Trendnet have announced a gigabit class, Powerline 1000, with the launch of the TPL-420E2K adaptors.

Trendnet Powerline 1000Based on the HomePlug AV2 standard and using MIMO techniques originally used in wireless data transmission, Powerline 1000 doubles the speed of the previous implementation.

Zak Wood, director of global marketing of Trendnet said, “Trendnet’s TPL-420E2K is designed to easily handle multi-HD streams in a busy connected home.

For the first time, Powerline products use all three electrical wires: the live, neutral, and ground (earth) wires. MIMO technology sends information over the fastest two out of the three available electrical wires. If a user lives in an old home which is not cabled with ground wires, the maximum throughput is reduced from 1,000 to 600 Mb/s.

The TPL-420E2K connects over electrical lines for distances of up to 300 m (a little less than 1000 ft), which is roughly the size of 5,000 square foot home. Powerline 1000 is compatible with existing Powerline 500, 200 and HomePlug AV rated products but when connected to a lower speed adapter, speeds are reduced to the lower rated adapter.

As you’d expected, the communication between the adapters is encrypted and to reduce energy consumption, the TPL-420E2K units go into standby mode when not in use.

The MSRP is US$169 but the Powerline 1000 units are not expected until June 2014. I’m looking forward to testing these already, especially if Trendnet produces an adaptor which incorporates a fast wireless access point.


Practical Meter for USB Charging



Practical MeterWith the plethora of USB charging power sources and charging rates, it was probably inevitable that someone would develop a meter to measure the power going to a device. The bragging rights go to Utah-based Power Practical and the Practical Meter, a USB in-line power meter. Looking much like a USB dongle, 5 LEDs show the power transfer from 1 W up to 10 W.

Originally a Kickstarter campaign that met its funding back in the July raising nearly $170,000, the Practical Meter has been today recognised as International CES Innovations 2014 Design and Engineering Awards Honoree.  “Just last week we shipped out the 10,000 pre-order units we received during our Kickstarter campaign to have the Practical Meter come to market,” says Matt Ford, CEO of Power Practical. “It’s crazy that a week later we’re being honored by something as prestigious as the CES Innovations awards.

As a pure USB device, it will work with anything that charges via USB such as smartphones, mp3 players or battery packs. Practical Meter is available now for $24.99 online and includes a 3-in-1 fast charge cable with mini-USB, micro-USB and Apple connectors.

Practical Meter Charging


Making Solar Pay



I have always been fascinated by the idea of generating my own electric power. Back in late 1998 I installed a solar power system that has sixteen 75 watt solar panels, along with a 4,000 watt power inverter/charger and a bank of expensive deep-cycle batteries.  Mention solar power, and most people think that all of these elements are necessary, including the expensive bank of batteries.

It turns out there is a much better way to think of home solar energy – use solar energy equipment strictly to push power back into the electric company utility grid. Batteries should never be considered to be part of a solar installation unless utility power just isn’t available, say in a remote location. Battery technology is an albatross when it comes to being able to store enough power to meet real-world needs.

If electric grid power is available, there are only two elements necessary – the arrays of solar panels, and what are called grid-tie inverters. In this battery-free scenario, the math of pushing power back to the utility to offset electrical use becomes much more interesting.

Power companies in the United States are required by law to “buy back” consumer-generated power. A grid-tie inverter takes the DC power being generated by the solar panels, inverts it into AC power, and then sends it back directly into the grid via a standard AC power plug plugged in to a regular 110 volt outlet. It is possible to have more than one grid-tie inverters, which also come in different sizes.

The relatively high-end inverter that I have is capable of producing 4,000 watts sustained output. So, if I wanted to push 4,000 watts back into the electric company utility grid, I would need at least two more arrays of solar panels feeding DC current into the inverter.

In my case, the batteries died within about the first three to four years. I simply turned the equipment off and my youngest brother sold the battery carcasses to a battery recycler. The equipment sat dormant until yesterday. A friend that does solar as a hobby helped me check the inverter and get it up and running again. I contacted my electric company and they sent a man out this afternoon to look over and approve my system, an absolutely necessary step. So the net effect is that now whenever there is daylight, the inverter is pushing power back into the grid. Obviously the maximum amount of power is generated when the solar panels are in direct sunlight.

The electric company performed a test of the inverter to make sure that if there is a grid power failure that the inverter automatically cuts off its own output. This is quite critical to the power company, because they want to be absolutely certain that in case of a grid power failure, no user-generated AC current is being fed back into the downed power lines.

I was able to verify that my inverter was pushing power back into the grid by turning off all internal breakers in my house so that no power was being used. At that point I looked at the power meter out on the utility pole and it was actually running backwards! Of course, in normal operation with different things consuming electricity in the house it is unlikely it will run backwards much, but it will be slowed somewhat.

My local electric company is a rural electric cooperative and they actually encourage customers to set up these types of “selling” consumer-generating power systems. It helps them reduce peak demand, thus reducing the need for more electrical generating capacity on the utility’s side. Solar panels are generating electricity at peak capacity when peak demand is likely to occur when air conditioning demands are at their highest.

Can a system like this ever pay for itself? It depends on the initial cost of the equipment, installation expenses, and how long of a payback period you are able to live with. If you can do most of the installation work yourself, then obviously the math works better. Eliminating the batteries really helps the cost come down.

An HQRP 1,000 watt grid-tie inverter sells for $287.95 on Amazon.Com. Aleko brand 75-watt solar panels sell for  $149 dollars each. Sixteen of these solar panels multiplies out to $2,384 dollars. With brackets, wiring and installation let’s estimate a total package price of $4,000, which may or may not be wildly off one way or the other. The 1,000 watt electrical output of the inverter would have to offset $4,000 dollars worth of electricity over a period of years before it would pay for itself, which is likely a long period of years. If the price of the equipment and installation can be brought down, then the payback period shortens.

My electric company will only allow this type of setup to function as an offset. So, let’s say that someone was putting more power back into the grid than they were actually consuming. My power company will never issue a check for the power, so it’s really just an offset for how much I consume. With enough equipment feeding power back into the grid, it would be possible to bring electrical grid usage down to zero.

Many local and state governments offer tax rebates for new solar equipment installations, which could also help mitigate the cost.

The beauty of a battery-free grid-tie solar user-generated power system feeding into the electrical grid is that once it is initially set up, everything happens automatically. Since I already have the equipment and it is long since paid for, I might as well be utilizing it to offset a portion of my power usage.